I didn't find the book believable. A six year old is still a six year old and does not have many of the abilities this child is supposed to have. The trapper was a kidnapped child himself. He takes his skins in and gets TV dinners. How did he figure out where to take the skins? How much should he get for them? Nobody tries to communicate with him? The trapper just happens to be in the right place at the right time to take the child to his cave before freezing. In that vast wilderness? I can see a sequel coming up.